Alors, c’est fini! Et maintenant?

Machine Upgrade in Stages Push LHC performance without new hardware –luminosity →2.3x10 34 cm -2 s -1, E b =7→7.54 TeV LHC IR upgrade –replace low-  quadrupoles after ~7 years peak luminosity →4.6x10 34 cm -2 s -1 LHC injector upgrade –peak luminosity →9.2x10 34 cm -2 s -1 LHC energy upgrade –E b →13 – 21 TeV (15 → 24 T dipole magnets)

Indicative Physics Reach Approximate mass reach machines:  s = 14 TeV, L=10 34 (LHC) : up to  6.5 TeV  s = 14 TeV, L=10 35 (SLHC) : up to  8 TeV  s = 28 TeV, L=10 34 : up to  10 TeV Units are TeV (except W L W L reach)  Ldt correspond to 1 year of running at nominal luminosity for 1 experiment † indirect reach (from precision measurements) Ellis, Gianotti, ADR hep-ex/ updates PROCESS LHC 14TeV 100 fb -1 SLHC 14TeV 1000 fb -1 SLHC 28TeV 100 fb -1 LinCol 0.8 TeV 500 fb -1 LinCol 5 TeV 100 fb -1 Squarks WLWLWLWL 2σ2σ 4σ4σ 4.5 σ Z’Z’ 5688†8† 8†8† Extra Dim (δ=2) † † q*q* Λ comp TGC (λ γ )

ILC as N’th Generation e+e- Collider 2010 …

Precision Physics at the Terascale Elementary particles Well-defined –energy –angular momentum Uses full CoM energy Produces particles democratically Can mostly fully reconstruct events Need to know what energy is interesting

LHC ILC Higgs Event Topology e + e – → Z H Z → e + e –, H → b b

H   ttH  WbWbbb  l jjbbbb Bkg. ATLAS ILC （ e+e-→HZ production ） Typical numbers Tagging efficiency ~ % S/N > 1 30fb -1 ５００ｆｂ －１ LHC & ILC Higgs Signals

M h = 120 GeV The ILC can measure the spin of any “Higgs” produced Measure the energy dependence of the production cross section from threshold What Kind of “Higgs” is it ? Measure the quantum numbers. The Higgs is a scalar

Precision Measurement of Higgs Couplings SM “Beyond SM” ILC Precision

SUSY and Dark Matter Dark Matter favored regions in cMSSM parameter space LSP neutralino mass and precision on relic density at LCC1

ILC Reference Design 12

Basic element of the technology is a nine-cell 1.3 GHz niobium cavity. Approximately 160 of these cavities have been fabricated by industry as part of R&D program at DESY. A Primary Cost Driver for ILC -- Superconducting RF Technology

Theoretical Limitation on Accelerating Field Type II Superconductor can support a magnetic field before quench. Formerly optimized to control field emission. Cf. TESLA New surface treatments stop field emission from being limitation. Allow optimization of for highest.

ILC500 Gradient dependence with tunnel length and cost Relative Cost Eacc [MV/m] TESLA ILC BC ILC AC (acceptance) Why Aim for Higher Gradient ?

ICHIRO Cavity Goal ： 51 MV/m.

Light Chemical Polishing (CP) HF(46%) : HNO 3 (60%) : H 3 PO 4 (85%) 1 :1 : 1 in volume CP for 1 minute at 25 O C. Removal thickness = 10 μm. Prepare smooth surface before EP. Annealing/Degassing in furnace 750 O C for 3 hours Degassing of hydrogen important. Temperature and time optimized for cavity softness and cost. Light Chemical PolishingAnnealing - Degassing

TRIUMF